Messages sent from Facebook Messenger don't seem to be synced to MightyText :(
This is not a problem MightyText may be able to fix. Android settles multiple messenger apps with priorities. Facebook is arrogant enough to think they are the only people needing to read your texts, so set it as high as possible in the priority listing. MightyText may not even know you got a text message because Facebook blocks Mighttext by other deleting it from your inbox, or doesn't forward the notification on.
yeah we need an update for facebook messenger ! please :)
ROGER THAT! I reported this to mightytext support many months ago, never heard back from them.. To bad because facebook messenger is really a GREAT app to text, especially now with heads.